Torrente Meduna sample 16 (Miocene of Italy)

Also known as Protoma rotifera community sample 16

Where: Pordenone, Italy (46.2° N, 12.8° E: paleocoordinates 46.0° N, 12.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Maraldi Sandstone Formation, Tortonian (11.6 - 7.2 Ma)

• Miocene Torento-Meduna sequence unconformably overlies the Eocene Clauzetto Flysch (Flysch di Clauzetto) and is composed of Preplans Sandstone, Zouf marl, Rugo Mizza Sandstone, San Martino Calcarenite, Torrente Meduna Siltstone, Maraldi Sandstone, Bier Puddingstone, and Montello Conglomerate. Thickness of the Maraldi Sandsone is approximately 220 m.

• bed-level stratigraphic resolution

Environment/lithology: prodelta; silty marl

• "In the absence of age-diagnostic species, a Tortonian age was inferred on the basis of stratigraphic position".
• Maraldi Sandstone "consists of fine to very fine-grained, yellowish sandstone, thickening upwards, alternating with darker, micaceous silty-marl forming beds of various thickness".

Size class: macrofossils

Collection methods: bulk,

• Based on single bulk samples, about 30 cubic centimetres each. Grain size data also provided.

Primary reference: M.P. Bernasconi and E. Robba. 1993. Molluscan palaeoecology and sedimentological features: an integrated appraoch from the Miocene Meduna section, northern Italy. Palaeogeography, Palaeoclimatology, Palaeoecology 100:267-290 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 37367: authorized by Austin Hendy, entered by Austin Hendy on 14.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• In enterers opinion the taxonomic list is representative of molluscan taxa, however no non-mollusca taxa are detailed. The reference states "Megafauna, mainly consisting of molluscs, is particularly abundant in the silty-marl levels where bivalves are prevalent; arenaceous beds contain diverse gastropod assemblages".
Bivalvia
 Pectinida - Pectinoidae
"Chlamys multistriata" = Crassadoma multistriata
"Chlamys multistriata" = Crassadoma multistriata Poli 1795 scallop
 Pectinida - Anomiidae
Anomia ephippium Linnaeus 1758 jingle
 Ostreida - Gryphaeidae
 Mytilida - Mytilidae
"Mytilus fuscus" = Botula fusca, Mytilus rissoi
"Mytilus fuscus" = Botula fusca Gmelin 1791 mussel
 Cardiida - Veneridae
"Venus multilamella" = Venus (Ventricoloidea) multilamella Lamarck 1818 venus clam
Subspecies: Venus multilamella glabroides
Pelecyora islandicoides Lamarck 1818 venus clam
 Cardiida - Solecurtidae
 Thraciida - Thraciidae
Gastropoda
 Neogastropoda -
"Ancilla glandiformis" = Amalda glandiformis
"Ancilla glandiformis" = Amalda glandiformis Lamarck 1810 snail
 Neogastropoda - Fasciolariidae
 Truncatelloidea - Tornidae
Tornus sp. Turton and Kingston 1830 snail
 Sorbeoconcha - Turritellidae
Protoma rotifera Deshayes 1832 turret shell